/Engine/Plugins/MovieScene/SequencerScripting/Source/SequencerScripting/Public/ExtensionLibraries/MovieSceneVectorTrackExtensions.h
Set the number of channels used for this track
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Sequencer|Track", Meta=(ScriptMethod)) static void SetNumChannelsUsed ( [UMovieSceneFloatVectorTrack](API\Runtime\MovieSceneTracks\Tracks\UMovieSceneFloatVectorTrack) * Track, int32 InNumChannelsUsed )